Tumbler ported to GDBus

[Ali Abdallah]

Dear all,

This is to announce that tumbler has been ported to GDBus and it does 
not rely anymore on dbus-glib. In addition, I removed the low level dbus 
calls in favour of their glib equivalents. The gsf_msole_metadata_read 
function has been deprecated, so I replaced it with 
gsf_doc_meta_data_read_from_msole.

You can find the code to test at my user repo:

http://git.xfce.org/users/ali/tumbler/

Cheers,
Ali